NCLEX-RN Pharmacology Practice
Questions: Gastrointestinal System |
20 Original NGN-Style MCQs with
Detailed Rationales |
Nursing Exam Prep |
ATI Pharmacology Made Easy Inspired |
PDF Study Guide
Question 1
Clinical Scenario
A 68-year-old man is admitted with worsening
gastroesophageal reflux disease (GERD). His history includes
hypertension, atrial fibrillation treated with warfarin,
osteoporosis, and chronic kidney disease stage 3. The provider
prescribes pantoprazole 40 mg orally once daily. The patient
asks why he cannot simply continue taking over-the-counter
antacids after every meal.
Question Stem
,Which nursing response best explains the therapeutic action of
pantoprazole?
A. "Pantoprazole neutralizes stomach acid that has already been
produced."
B. "Pantoprazole blocks histamine receptors to decrease acid
secretion immediately."
C. "Pantoprazole irreversibly inhibits the gastric proton pump,
reducing acid production."
D. "Pantoprazole coats the stomach lining and forms a
protective barrier against acid."
Correct Answer
Correct Answer: C. "Pantoprazole irreversibly inhibits the
gastric proton pump, reducing acid production."
Detailed Rationale
Pantoprazole is a proton pump inhibitor (PPI) that irreversibly
inhibits the H+/K+-ATPase enzyme (proton pump) in gastric
parietal cells, producing profound suppression of gastric acid
secretion. Because it blocks the final step of acid production, it
is more effective than antacids for healing erosive esophagitis
and managing chronic GERD. The medication is most effective
when taken before meals, allowing active proton pumps to be
inhibited.
,Option A is incorrect because antacids neutralize acid already
present in the stomach rather than preventing its production.
Option B describes the mechanism of H2-receptor antagonists
such as famotidine rather than PPIs. Option D describes
sucralfate, which creates a protective coating over ulcerated
tissue instead of suppressing acid production.
The nurse should educate patients that symptom improvement
may occur within several days, but complete healing often
requires weeks of therapy. Long-term PPI use has been
associated with increased risks of fractures, hypomagnesemia,
vitamin B12 deficiency, and Clostridioides difficile infection.
Patients receiving warfarin or other medications metabolized by
hepatic enzymes should be monitored for clinically significant
interactions and changes in therapeutic response.
Learning Objectives
After completing this question, the learner should be able to:
• Explain the mechanism of action of proton pump
inhibitors.
• Differentiate PPIs from antacids and H2-receptor
antagonists.
• Identify important long-term safety considerations
associated with PPIs.
Medication Safety Focus
, Monitoring
Question 2
Clinical Scenario
A 55-year-old woman with peptic ulcer disease is prescribed
sucralfate suspension four times daily. Her medication list
includes levothyroxine, ciprofloxacin, calcium carbonate, and a
daily multivitamin. She asks the nurse whether she can take all
of her medications together to avoid forgetting doses.
Question Stem
Which instruction should the nurse provide?
A. Take all medications together with meals.
B. Separate sucralfate from other oral medications by at least 2
hours.
C. Crush all medications and mix them with the sucralfate
suspension.
D. Take sucralfate only after antacids to improve absorption.
Correct Answer
Correct Answer: B. Separate sucralfate from other oral
medications by at least 2 hours.
Detailed Rationale
Questions: Gastrointestinal System |
20 Original NGN-Style MCQs with
Detailed Rationales |
Nursing Exam Prep |
ATI Pharmacology Made Easy Inspired |
PDF Study Guide
Question 1
Clinical Scenario
A 68-year-old man is admitted with worsening
gastroesophageal reflux disease (GERD). His history includes
hypertension, atrial fibrillation treated with warfarin,
osteoporosis, and chronic kidney disease stage 3. The provider
prescribes pantoprazole 40 mg orally once daily. The patient
asks why he cannot simply continue taking over-the-counter
antacids after every meal.
Question Stem
,Which nursing response best explains the therapeutic action of
pantoprazole?
A. "Pantoprazole neutralizes stomach acid that has already been
produced."
B. "Pantoprazole blocks histamine receptors to decrease acid
secretion immediately."
C. "Pantoprazole irreversibly inhibits the gastric proton pump,
reducing acid production."
D. "Pantoprazole coats the stomach lining and forms a
protective barrier against acid."
Correct Answer
Correct Answer: C. "Pantoprazole irreversibly inhibits the
gastric proton pump, reducing acid production."
Detailed Rationale
Pantoprazole is a proton pump inhibitor (PPI) that irreversibly
inhibits the H+/K+-ATPase enzyme (proton pump) in gastric
parietal cells, producing profound suppression of gastric acid
secretion. Because it blocks the final step of acid production, it
is more effective than antacids for healing erosive esophagitis
and managing chronic GERD. The medication is most effective
when taken before meals, allowing active proton pumps to be
inhibited.
,Option A is incorrect because antacids neutralize acid already
present in the stomach rather than preventing its production.
Option B describes the mechanism of H2-receptor antagonists
such as famotidine rather than PPIs. Option D describes
sucralfate, which creates a protective coating over ulcerated
tissue instead of suppressing acid production.
The nurse should educate patients that symptom improvement
may occur within several days, but complete healing often
requires weeks of therapy. Long-term PPI use has been
associated with increased risks of fractures, hypomagnesemia,
vitamin B12 deficiency, and Clostridioides difficile infection.
Patients receiving warfarin or other medications metabolized by
hepatic enzymes should be monitored for clinically significant
interactions and changes in therapeutic response.
Learning Objectives
After completing this question, the learner should be able to:
• Explain the mechanism of action of proton pump
inhibitors.
• Differentiate PPIs from antacids and H2-receptor
antagonists.
• Identify important long-term safety considerations
associated with PPIs.
Medication Safety Focus
, Monitoring
Question 2
Clinical Scenario
A 55-year-old woman with peptic ulcer disease is prescribed
sucralfate suspension four times daily. Her medication list
includes levothyroxine, ciprofloxacin, calcium carbonate, and a
daily multivitamin. She asks the nurse whether she can take all
of her medications together to avoid forgetting doses.
Question Stem
Which instruction should the nurse provide?
A. Take all medications together with meals.
B. Separate sucralfate from other oral medications by at least 2
hours.
C. Crush all medications and mix them with the sucralfate
suspension.
D. Take sucralfate only after antacids to improve absorption.
Correct Answer
Correct Answer: B. Separate sucralfate from other oral
medications by at least 2 hours.
Detailed Rationale
